太阳黑子与光桥

2023年5月17日

Sunspot with Light Bridge
Image Credit & Copyright: Mark Johnston

Explanation: Why would a small part of the Sun appear slightly dark? Visible is a close-up picture of sunspots, depressions on the Sun’s surface that are slightly cooler and less bright than the rest of the Sun. The Sun’s complex magnetic field creates these cool regions by inhibiting hot material from entering the spots. Sunspots can be larger than the Earth and typically last for about a week. Part of active region AR 3297 crossing the Sun in early May, the large lower sunspot is spanned by an impressive light bridge of hot and suspended solar gas. This high-resolution picture also shows clearly that the Sun’s surface is a bubbling carpet of separate cells of hot gas. These cells are known as granules. A solar granule is about 1000 kilometers across and lasts for only about 15 minutes.

Your Sky Surprise: What picture did APOD feature on your birthday? (post 1995)

Tomorrow’s picture: star debris

太阳黑子与光桥
影像提供与版权: Mark Johnston

说明: 为何一小部分的太阳看起来有点暗？这幅影像所呈现的是太阳黑子的特写，而太阳表面的这种区域，其温度和亮度皆略低于太阳的其他区域。太阳复杂的磁场会抑制炽热物质流入太阳黑子区，从而产生这些低温区域。太阳黑子可大于地球，而其存续的时间通常约为一星期。影像所呈现的是活跃区AR 3297的一部分，它在5月初旋过太阳，而其下方的庞大阳黑子，则有一道由炽热悬浮的太阳气体所聚成的庞大光桥跨在其上。这幅高解析的影像还清楚的显示，太阳表面是由一个个炽热气体对流胞所织就的翻腾光毯。这种对流胞名为米粒组织。一颗太阳米粒组织的宽度约为1,000公里，存续的时间则仅有15分钟左右。

您的天空惊喜: APOD在你生日那天拍了什么照片？（1995年后）

明日的图片: star debris